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  • 1
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The histoblood-group ABO carbohydrate antigens are well known as important factors in blood transfusions, but they can also act as receptors for infectious agents and have been implicated in susceptibility to certain carcinomas. A single-chain variable-domain antigen-binding fragment (scFv) gene based on the known sequence of an anti-blood-group-A monoclonal antibody (AC1001) has been synthesized and expressed in Escherichia coli. The purified scFv preparation existed primarily in the monomeric form but also contained large amounts of dimeric and higher oligomeric forms. The corresponding variable-domain antigen-binding fragment (Fv) was generated by cleaving the VL–VH linker with subtilisin, and its activity was demonstrated by surface plasmon resonance with an immobilized bovine serum albumin A–trisaccharide conjugate (KD = 290 µM). AC1001 Fv crystals grown in the presence of N-acetylgalactosamine diffracted to 0.93 Å resolution. This is the first reported example of a crystal of an antibody antigen-binding fragment diffracting to atomic resolution.
    Type of Medium: Electronic Resource
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